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Recent progress in hydrodynamic characteristics research and application of annular centrifugal extractors

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Frontiers of Chemical Science and Engineering 2022年第6期16卷 854-873页

作者： Hang Yang Xiaoyong Yang Xiao Dong Zhaojin Lu Zhishan bai Yinglei Wang Fulei Gao School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China Xi'an Modern Chemistry Research Institute Xi'an 710000China

The annular centrifugal extractor(ACE)integrates mixing and separation.It has been widely used in many industrial fields because of its low residence time,compact structure,and high mass transfer efficiency.Most of the literature has focused on flow instabilities,flow visualization,and computational fluid dynamics simulations.More recently,research on hydrodynamic behavior and structural optimization has received widespread attention.With the development of ACE technology,applications have been broadened into several new areas.Hence,this paper reviews research progress regarding ACE in terms of hydrodynamic characteristics and the structural improvements.The latest applications covering hydrometallurgy,nuclear fuel reprocessing,bio-extraction,catalytic reaction,and wastewater treatment are presented.We also evaluate future work in droplet breakup and coalescence mechanisms,structural improvements specific to different process requirements,scaling-up methods,and stability and reliability after scaling-up.

关键词： annular centrifugal extractor hydrodynamic characteristics structure optimization the latest application

Oil droplet movement and micro-flow characteristics during interaction process between gas bubble and oil droplet in flotation

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Chinese Journal of Chemical Engineering 2022年第5期35卷 229-237页

作者： Shenglin Yan Yan Zhang Chong Peng Xiaoyong Yang Yuan Huang Zhishan bai Xiao Xu State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China Sinopec Dalian Research Institute of Petroleum and Petrochemicals Dalian 116041China Institute of Environmental Pollution and Health School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China

Flotation is an efficient pre-treatment technology for oily water.In this work,the interaction process between the moving oil droplet and the gas bubble was studied by high-speed camera and Bassset-Boussinesq-Oseen(BBO)theoretical model,and the experimental and simulation results of the oil droplet trajectory were compared.Moreover,the micro-particle image velocimetry system was utilized to observe the flow inside and outside of the moving oil droplet.The results show that the BBO model with the mobile bubble’s surface can reflect the velocity change trend of the oil droplet during the interaction process between the moving oil droplet and the gas bubble,but there are some significant differences between the experimental and simulation results.While the oil droplet is moving on the bubble’s surface,the velocity of the area near the contact point of oil droplet–gas bubble is less than that of the other areas inside the oil droplet.Meanwhile,the flow of water above the oil drop is more biased towards the gas bubble.

关键词： Flotation Oil droplet-gas bubble interaction Approach process Hydrodynamics

Microfluidic synthesis of renewable biosorbent with highly comprehensive adsorption performance for copper （II）

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Frontiers of Chemical Science and Engineering 2017年第2期11卷 238-251页

作者： Yong Zhu Zhishan bai Bingjie Wang Linlin Zhai Wenqiang Luo State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and Technology Shanghai 200237 China

A microsphere biosorbent with uniform size （CV = 1.52%）, controllable morphology and component, and high mechanical strength was synthesized from chitosan by microfluidic technology combining with chemical crosslinking and solvent extraction. This chitosan microsphere （CS-MS） was prepared with a two-step solidification process, which was acquired by drying for the enhancement of mechanical property in final. The adsorption behavior of CS-MS towards copper （II） and main influencing factors on adsorption performance were investigated by batch experiments. Kinetic data high-lighted dominant chemical bonding along with electrons transferring in adsorption process. Isothermal analysis indicated that adsorption capacity was relevant to the number of active site. All these explorations provided a new direction for preparing highly comprehensive performance sorbent used in heavy metal treatment via microfluidic technology.

关键词： chitosan microsphere microfluidic technol- ogy adsorption copper （II）

Fabrication of chitosan microspheres for efficient adsorption of methyl orange

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Chinese Journal of Chemical Engineering 2018年第3期26卷 657-666页

作者： Linlin Zhai Zhishan bai Yong Zhu Bingjie Wang Wenqiang Luo State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Mechanical and EngineeringEast China University of Science and Technology

In this article, morphology, structure and size controllable chitosan microspheres with high mechanical strength were synthesized by microfluidic technology combining chemical crosslinking and used as an adsorbent for methyl orange. The synthesized adsorbents were characterized using scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR), and an Energy Dispersive Spectrometer(EDS). The effect of pH revealed that the adsorption process depended on pH and the pH variation of methyl orange solution after adsorption indicated that adsorption capacity was affected through the associated role of chitosan nature and pH variation. Experimental results suggested that the as-prepared chitosan microspheres were controlled within a narrow size distribution(coefficients of variation is 1.81%), whose adsorption capacity reached to 207 mg·g^(-1) and mechanical strength was suitable to resist forces. In addition, the adsorption isotherm was well fitted with the Langmuir model, and the adsorption kinetic was best described by the pseudo-second-order kinetic model.The high performance microfluidic-synthesized chitosan microspheres have promising potentials in the applications of removing dyes from wastewater.

关键词：吸附物橘子扫描电子显微镜 Fourier 制造吸附能力尺寸分布运动模型

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离子印迹吸附微球微流控制备及DFT性能

工程科学与技术 2019年第6期51卷 36-43页

作者：王炳捷白志山杨晓勇华东理工大学机械与动力工程学院

为了实现复杂体系重金属废水中目标金属离子的高效选择性去除,基于微流控和离子印迹技术,制备了离子印迹壳聚糖吸附微球,通过批量吸附实验验证和DFT分子模拟佐证的方法,系统研究了吸附微球的吸附特性,探究了目标重金属离子与吸附微球的... 详细信息

为了实现复杂体系重金属废水中目标金属离子的高效选择性去除,基于微流控和离子印迹技术,制备了离子印迹壳聚糖吸附微球,通过批量吸附实验验证和DFT分子模拟佐证的方法,系统研究了吸附微球的吸附特性,探究了目标重金属离子与吸附微球的相互作用机制和靶向结合原理。研究结果表明,离子印迹壳聚糖微球在优化的恒温震荡吸附条件(35℃和160 r/min,Cu离子溶液初始浓度400 mg/L、pH=6)下,可在48 h内到达吸附平衡,对Cu离子的最大吸附容量为117.76 mg/g。此外,吸附速率和等温吸附实验结果符合准二级吸附动力学模型和Langmuir等温吸附模型,证明离子印迹壳聚糖微球对Cu离子的吸附过程是伴随着电子转移的单层化学吸附过程。而基于印迹模板的离子尺度效应和高电负性、以及目标金属离子与吸附微球分子单体间强结合能,能够实现离子印迹壳聚糖吸附微球在二元和(或)三元共存体系中对Cu离子的快速识别捕获和吸附分离。该研究结果可为新型高效吸附微球的研发和性能优化提供理论指导。

关键词：壳聚糖吸附微球选择性去除微流控离子印迹 DFT分子模拟

CFD数值模拟技术在液滴微流控多相流特性研究的应用进展

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化工进展 2021年第4期40卷 1715-1735页

作者：王炳捷李辉杨晓勇白志山华东理工大学机械与动力工程学院上海200237

高集成化的微流控系统具有界面面积大、传递距离短、混合速度快等优势,已被广泛应用于许多科学领域。然而,微通道内多相流间的相互作用及动力学行为受多方面的影响,仅依靠试验观测技术和理论预测方法难以全面了解多相流传质传热过程、... 详细信息

高集成化的微流控系统具有界面面积大、传递距离短、混合速度快等优势,已被广泛应用于许多科学领域。然而,微通道内多相流间的相互作用及动力学行为受多方面的影响,仅依靠试验观测技术和理论预测方法难以全面了解多相流传质传热过程、获取流场特性参数、揭示多相流相互作用规律。当下CFD数值模拟技术的快速发展为预测和分析微流控通道内的多相流问题提供了更为直观、有效、准确的帮助。本文对数值模拟技术在液滴微流控多相流特性研究的应用进展进行全面综述,涵盖液滴微流控装置结构及演变、液滴微流控模拟方法及优化以及微通道内多相流作用过程及原理。

关键词：微流控数值模拟多相流

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离心萃取分离机在酰胺化液分离中的应用

化工进展 2010年第11期29卷 2203-2206页

作者：苏华白志山中国石油化工股份有限公司石家庄炼化分公司河北石家庄050032 华东理工大学上海200237

为了控制重排反应的质量和反应平稳,以酰胺化液的两相分离为研究对象,开发了离心萃取分离装置,考察了转速、流量对分离性能的影响。研究结果表明:相同转速下,随着流量的提高,分离性能变差;提高转速可提高设备的最大处理能力。酰胺化液... 详细信息

为了控制重排反应的质量和反应平稳,以酰胺化液的两相分离为研究对象,开发了离心萃取分离装置,考察了转速、流量对分离性能的影响。研究结果表明:相同转速下,随着流量的提高,分离性能变差;提高转速可提高设备的最大处理能力。酰胺化液应用离心萃取分离技术可提高分离效果,减少了副产物的产生,提高装置收率。

关键词：离心萃取分离机酰胺化液分离

国产硫酸法烷基化精制系统中脱酸技术开发与应用

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化工进展 2022年第3期41卷 1430-1439页

作者：鲁朝金任官伟吕福炜董霄白志山华东理工大学机械与动力工程学院上海200237 宁阳县公路事业发展中心山东泰安271400

烷基化油是国Ⅵ汽油质量升级的关键调和组分,在国内市场的需求量和产能不断扩大的情形下,如何提高烷基化产品的质量和生产过程的清洁是烷基化发展的重点方向。本文综述了硫酸法烷基化反应流出物处理技术现状,简述了STARCTCO工艺中传统... 详细信息

烷基化油是国Ⅵ汽油质量升级的关键调和组分,在国内市场的需求量和产能不断扩大的情形下,如何提高烷基化产品的质量和生产过程的清洁是烷基化发展的重点方向。本文综述了硫酸法烷基化反应流出物处理技术现状,简述了STARCTCO工艺中传统酸洗、碱洗、水洗湿式处理技术流程,并重点介绍了纤维强化聚结分离技术在国产SINOALKY工艺中的工程开发及成功应用。基于实验研究和侧线试验,在国产硫酸法烷基化反应流出物处理领域开发出多级精细聚结干式处理技术。精制系统中干式脱酸技术的开发与应用显著降低了能耗和相关环境污染,提高了装置的环保性,有助于我国烷基化技术的绿色低碳发展。

关键词：硫酸法烷基化 SINOALKY工艺乳液聚结分离减污降碳

绿色化学理念融入化工专业多相催化课程教学的探索与实践

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化工高等教育 2023年第2期40卷 120-125页

作者：潘云翔白志山彭冲上海交通大学化学化工学院化工系上海200240 华东理工大学机械与动力工程学院上海200237 上海交通大学电子信息与电气工程学院上海200240 中国石油化工股份有限公司大连石油化工研究院辽宁大连116045

在“双碳”战略背景下,强化绿色化学教育,成为高等学校化工专业人才培养工作的重要任务之一。在化工专业多相催化课程教学中,为每一章节安排“绿色课时”,讲解与该章节内容相关的绿色化学理论与技术,将绿色化学理念融入课程教学中,不仅... 详细信息

在“双碳”战略背景下,强化绿色化学教育,成为高等学校化工专业人才培养工作的重要任务之一。在化工专业多相催化课程教学中,为每一章节安排“绿色课时”,讲解与该章节内容相关的绿色化学理论与技术,将绿色化学理念融入课程教学中,不仅能使学生牢固掌握化工专业知识,而且能使学生加深对绿色化学的认识,同时能提高学生利用绿色化学理论与技术解决化工专业问题的能力。这对于培养既具有扎实化工基础又具有绿色化学理念的综合性化工专业人才具有重要意义。

关键词：绿色化学教学模式化工专业